19497309868 has 6 divisors (see below), whose sum is σ = 34120292276. Its totient is φ = 9748654932.

The previous prime is 19497309779. The next prime is 19497309917. The reversal of 19497309868 is 86890379491.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2437163730 + ... + 2437163737.

Almost surely, 2^19497309868 is an apocalyptic number.

It is an amenable number.

19497309868 is a deficient number, since it is larger than the sum of its proper divisors (14622982408).

19497309868 is a wasteful number, since it uses less digits than its factorization.

19497309868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874327471 (or 4874327469 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 64.

The spelling of 19497309868 in words is "nineteen billion, four hundred ninety-seven million, three hundred nine thousand, eight hundred sixty-eight".